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MERC ER02-10
14
6.4. Trial 4 (SIE-07-10): 27 May – 1 June 2010
Presented as means and standard deviations.
Physical Parameters
TSS
mg/l
DOC
mg/l
POC
mg/l
T0 Ambient
12.7 (0.4)
3.16 (0.02)
1.29 (0.04)
T0 Enhanced
57.9 (1.7)
NA
5.36 (0.19)
Enhanced data is the average of 3 time points (2 reps per time point) during the fill time of the ballast tanks.
Ambient water is sampled at the beginning of the trial and before the water is enhanced.
Temp
o
C
Salinity
psu
Dis. Oxygen
mg/l
Turbidity
NTU
pH
T-0 Control
17.40 (0.03)
8.81 (0.03)
7.09 (0.10)
15.84 (1.11)
6.9 (0.1)
T-0 Treated
17.48 (0.02)
9.42 (0.00)
5.47 (0.04)
16.09 (1.21)
7.0 (0.1)
T-F Control
19.53 (0.01)
8.87 (0.00)
5.18 (0.10)
2.22 (0.08)
7.2 (0.1)
T-F Treated
19.69 (0.01)
9.48 (0.00)
5.57 (0.02)
6.07 (0.13)
7.2 (0.1)
Live Organisms > 50
µ
m
T0
#/m
3
TF
#/m
3
Control
113,333 (14,154)
63,500 (9,750)
Treated
13 (12)
1.8 (0.8)
*TF Control
*TF Treated
Calanoida (
Eurytemora sp.
)
Copepoda
Copepod nauplii
Bivalve larva
Polychaeta (Spionidae)
Bivalve larvae
* Up to four top taxa listed in order of abundance.
Live Organisms 10 - 50
µ
m
Vital Stain Results
-
It is important to note that the specific approach used underestimates
the abundances of live organisms in this size class because it has been found that not all live
organisms reliably take up these stains.
T0 #/ml
TF #/ml
Control
1,544 (103)
1,026 (133)
Treatment
1 (1)
1.2 (0.8)
Dominant species
Type
Other
Prorocentrum minimum
Dinoflagellate
Heterocapsa rotundatum
Dinoflagellate
Gymnodinium estuarale
Dinoflagellate
first time detected in 2010
Thalassiosira sp.
Diatom
chain-forming
Navicula sp.
Diatom